Posted by fixerupper on October 12, 2020 at 18:38:28 from (108.161.63.205):
In Reply to: Fire posted by sourgum on October 12, 2020 at 11:56:36:
I have been involved somewhat with the new big high horsepower combines in the past few years. What I see is basically more crop being crammed through a machine that is not all that much bigger physically. To do this they bump up the horsepower and run gear boxes and belts to the maximum of capacity. When we are looking at 500- 700 horsepower in the case of the new Fendts a lot is being asked out of everything that engine powers. Older machines ran the power train at a certain percentage below the maximum potential of the components. The new machines seem to push the power train at near 100% capacity. This means more heat, failed seals because of the heat and fire potential when the oil leaks out of a hot gear box. Older machines used belts and chains to transmit power , new machines use fewer belts and more gear boxes. On an older combine like the ones I grew up with if something plugs and a belt smokes we can tighten the belt and keep going. The belt life is shortened but it will still work for awhile. On some of the new machines if something plugs the belt is shredded. So much power is demanded out of that belt there is no more leeway. Plastic fuel tanks do fuel the fire much quicker when the tank melts and it goes up fast but in my opinion by the time the fire gets big enough to melt the tank the combine is already junk.
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